I want to program a water supply pipeline network in a treeview control. It has five node (junctions). The parent-child relation is based on a parameter (say pressure). Initially, the node 1 is parent and its child nodes are 2 and 3. The node 3 has child nodes 4 and 5. At run time the pressure changes. Now, node 3 is parent and its child nodes are 1, 4 and 5. The node 1 has child node 2.
i want to fill a Datatable with a Datareader row by row but get an exception because the reader's columns have a different order than the Datatable's columns.
Why and how does a Datatable loads itself with a Datareader correctly, even so it has a column collection with different order?
I need to calculate values for every row so i dont want to load the Datatable completely but row for row. It has 25 columns so i dont want to set it all manually.
There must be a chance to load/fill/add a new row from a datareader without having the same column order(reader.GetSchemaTable?).
Following is what i have but what doesnt work:
Using reader As System.Data.SqlClient.SqlDataReader = command.ExecuteReader 'next line works(configInfo.DataSource is a Datatable)but is inappropriate configInfo.DataSource.Load(reader)
WINDOW Based Application using VBNET2008, DataReader and TreeView Control Nodes
I need your help, Please help me.
I am using TreeView controls and having problem writing the coding as I have not done it before.
Listed beow are the SQL String and the result of it. And also the Proposed Desired display on TreeView.
SQL String : SELECT OrderID, OrderDate ProductID FROM Invoices WHERE (CustomerID = N'Chops') Order by OrderID, Orderdate Result of SQL String OrderId OrderDate ProdID
How can I fill this Percentage array with Sql data reader..
Dim StudentID As Integer = Me.ComboBox1.SelectedValue Dim Percentage() As Integer Dim con As New SqlConnection("Data Source=.SQLEXPRESS;AttachDbFilename=D:Database
I'm looking for a recursive subroutine.I have the dataset from sql-server with in the datasource-table a parent- and a child-column. I made a routine to put the parent-nodes in the tree.The problem starts with the childs over so many levels.I can write it out but it is to much code, I'm sure it can be done more efficient with a recursive subroutine.
The tree will be about 25 levels deep.A few days ago I saw a recursive subroutine to fill the childnodes without the above difficulty to write alle the levels in code.That example I cannot find it any more, but it had a line of code more or less like this here below:
Dim Nodes As TreeNodeCollection = tv.Nodes(A).Nodes
I have a database with values as shown in the attached image "Image1.jpg". There are multiple other columns not shown on the screenshot (over 30), for the sake of this question we'll say I'm interested in columns called "Col1", "Col2", "Col3" & "Col4".
I was able to get this information automatically filled into a TreeView as shown on attached image "Image2.jpg".
At this point I also want to fill a DataGridView from the same database.
I managed to accomplish this with the following
Private Sub FillDataGrid() Dim DA As New OleDbDataAdapter Dim DS As New DataSet
[Code]....
But unfortunately this uses the manual binding of data to the DataGridView, which I'm sorry to say I struggled to "convert" if you like, to using SQL commands and coding to connect a database to DataGridView.
How to fill a TreeView from two related tables (Customers 1 -> Products n)? I have seen the example of microsoft using Northwin Database and I do not understand this, I need something simpler.
I'm trying to change the treeview image at runtime, i'm trying to apply the above code but nothing is happening. the goal is that i have an image i want to change it to another image at runtime.
These will all contain the same items and I need to add them at runtime. I know how to loop through the controls, but not sure how to make sure I'm only editing the correct comboboxes. (I will have to do this for 2 more sets of comboboxes with similar naming conventions as well)
I have created multiple dropdown list at runtime and populated with data. I also have added an eventhandler to determine the selected value of the drop down list.
The code is as follows : Dim tbl As New Table() tbl.EnableViewState = "true"
for an application, I generate RichTextBoxes during runtime with the following code. The code generate a new node in Treeview under parent node "Notes".
Dim RichTextBoxCounter As Integer = TreeView_MainForm.Nodes_("NodeNotes").Nodes.Count Dim NewNote As New RichTextBox NewNote.Size = New System.Drawing.Size(845, 550)[code].....
Now, I want to show the RichTextBox if the associated child node is selected. I tried the code below, but it does not work.
If TreeView_MainForm.SelectedNode.Text = "Notes" Then
Dim NewNote As New RichTextBoxPrintCtrl
If TreeView_MainForm.SelectedNode.Parent IsNot Nothing Then[code]......
provide the code to display the RichTextBoxes after selecting the node.
I am wondering if anyone has any idea how to make the controls stack and fill up the available space left by a control if the control is hidden or removed from the UltraGridBagLayoutPanel.
If I hide [Textbox 3] as of now, it will disperse the space left equally and pad the remaining text boxes with the space. However, I would like it to do this...
[Textbox 1] [Textbox 2] [Textbox 4] [Textbox 5]
Where all the text boxes will move up and [Textbox 4] will completely consume the space left by [Textbox 3].
I have a requirement for a new application development where I must present some information to the user for selection via drag and drop. VB offers the TreeView control which would work nice, however the user does not like the Treeview control's presentation. The user wants a control that work similar to the Mac's Finder control while in column view.
Apple's Mac Finder Control works similar to window's treeview. Finder has a nifty view capability that my users would like in some new development that is being done. The finder supports a "column" view. Similar to the treeview, it starts out in a root list. The difference being, when a user makes a selection and clicks on a node, the node doesn't expand, the sub nodes appear on the pane to the right of the list. Clicking on a sub node, will cause the pane to split again and the items within that sub node appear to the right again.
This will happen again and again with the left pane getting narrower as the user drives deeper into the sub nodes. That is what I am trying to replicate. Obviously, once the user reaches the base list of items, we have to support drag and drop capability. Does anyone know of a control for VB.NET that work similar to the Mac's Finder control?
I have a problem with my project. here is the problem:
My code for login is as follows:
dim conn as SqlConnection = New SqlConnection("Data Source.................) dim cmd as SqlCommand = New SqlCommand("Loguser",conn) cmd.CammandType = CommandType.StoredProcedure
[CODE]...
Now the error i get is that "there is a datareader associate with this connection that need to be closed"
i have a treeview which has a bunch of parent and child nodes preset at design time, there is 1 parent node tho which is called developer, that i want to add child nodes to at runtime.When the form first loads im trying to have it check a text file and for each line in the text file add the text/string from that as a child node tot he 'developer' parent node.
vb Dim reader As String = My.Computer.FileSystem.ReadAllText(Application.StartupPath() & "ConfigDevs.txt") Dim strs() As String = Split(reader, Environment.NewLine) For Each s As String In strs
[code]....
Thats what i have so far, how can i set it so 'Dim parentNode As TreeNode = ' points at the 'Developer' node?
Instead of computing the result for each value of variables in combo boxes 1 & 2 separately. I want to compute the result for all the values of variables in both the combo boxes. This whole collection of computations is to be displayed in the Data Grid View, while on top of each column I want combo boxes with the same values as combo box 1 & 2, to optimize the selection from Data Grid View.
I am making a user control named MultiSelect, which consists of a textbox. In this textbox I put substring. I want the user control to show a treeview outside the MultiSelect boundaries where items matching the substring will be shown.
For me its no problem to make a treeview inside the MultiSelect boundaries but I need to save space on the original form where a MultiSelect control will appear, so I need to do it like the treeview will appear and after I choose items, it will disappear
Basically, I have a view (can be converted into a store procedure) with two tables NODE and CONTACT. NODE is the parent table (NodeID) with the foreign key field in CONTACT (NodeID). The query works fine. I would like the treeview to look like this
I have a tier application based on this video url... So far the client application only has a reference to the Business Logic (not Data Access).If i needed to tie a control such as a TreeView to list certain data fields from my table then where and how should i do that? For example i could write a For each statement to iterate through the table which returns the item from a table or i could do it in the WCF service app but how does this tie in with a control such as TreeView especially when there are no references?
Does anyone knows how to achieve UI like the attached image. I need to have a Treeview control which will have nodes & child nodes and each node should have a ComboBox control next to it.
